High-frequency superposing module for driving laser diode
AssigneeMurata Manufacturing Co., Ltd.
InventorsYoshirou Satou, Kazuhiro Iida, Masamichi Tamura
Life of this patent
Estimating the term…
Abstract
A high-frequency superposing module for driving a laser diode includes an oscillating circuit and an impedance matching circuit. The impedance matching circuit includes a capacitor connected in series between the emitter of a transistor and the terminal through which a laser-diode drive signal is output; and a capacitor connected in parallel between the drive-signal output terminal and the ground. The oscillating circuit includes an inductor serving as a choke coil connected between the drive-signal output terminal and the collector of the transistor, thus allowing the drive-signal output terminal to serve as a power input terminal for the oscillating circuit.
Claims16
A high-frequency superposing module for driving a laser diode by supplying the laser diode with a drive current including a DC current and a high-frequency current superposed on the DC current, the module comprising:
- an oscillating circuit including:
- an oscillating active element;
- and
- a high-frequency blocking inductor connected between a drive-signal output terminal through which a signal for driving the laser diode is output and a source terminal of the oscillating active element, the drive-signal output terminal functioning as a power input terminal for the oscillating circuit;
- and
- an impedance matching circuit including:
- a capacitor connected in series between an output terminal of the oscillating active element and the drive-signal output terminal;
- and
- a capacitor connected in parallel between the drive-signal output terminal and a ground.
Dependencies are inferred from the claim text.